Reproduction In Plants
Gbogbo ọrọ náà
Every maize cob and every pod of beans began as a flower. Plants make the next generation in two very different ways. In sexual reproduction a flower brings male and female cells together to make seeds, mixing the qualities of two parents. In asexual reproduction a single plant grows a whole new plant from a piece of itself, a tuber or a cutting, with no seeds and no mixing at all. A farmer uses both: seeds to grow a maize field, cuttings to multiply a prized cassava.
In this lesson you will compare the wind-pollinated flower of maize with the insect-pollinated flower of a bean, follow pollen to the egg in fertilisation, and see how seeds and fruits are spread so that new plants are not crowded together. You will also learn why scattered weed seeds are so hard to control, and how planting tubers and cuttings lets a farmer copy a good plant exactly.
Ebumnobi
- (a) define the term sexual reproduction.
- (b) describe the structure and functions of the flowers of a maize plant and of a bean plant.
- (c) define the term pollination.
- (d) describe the process of fertilisation in a named plant.
- (e) describe how seeds and fruits are dispersed and explain the importance of dispersal in relation to weed control.
- (f) describe asexual reproduction from stem tubers (e.g. Irish potato and yam) and from stem cuttings (e.g. sweet potato, cassava and sugar cane).
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Reproduction In Plants. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Pollination is best described as the transfer of pollen from: A. One ovule to another B. An anther to a stigma C. The style to the ovary D. A seed to the soil Answer: B
- Which feature shows that a flower is wind-pollinated? A. Bright, scented petals B. A reward of nectar C. Large, feathery stigmas that hang outside D. Sticky pollen Answer: C
- Fertilisation in a flowering plant is the fusion of the: A. Anther and the filament B. Male nucleus and the female nucleus C. Stigma and the style D. Pollen and the petal Answer: B
- Which crop is normally grown from stem cuttings? A. Maize B. Bean C. Cassava D. Carrot Answer: C
- An advantage of growing a crop from tubers or cuttings is that the new plants are: A. More varied than the parent B. Identical to the parent C. Always disease-free D. Produced from seed Answer: B
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Reproduction In Plants? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
Dawunlodi Ẹpp naa lori Google Playstore.
Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.
